CN112610512A

CN112610512A - Fan housing of fan, fan and electrical apparatus

Info

Publication number: CN112610512A
Application number: CN202011360325.2A
Authority: CN
Inventors: 金毅; 周亚运; 张伟
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-04-06
Anticipated expiration: 2040-11-27
Also published as: CN112610512B

Abstract

Embodiments of the present invention provide a wind turbine comprising a wind shield, a stator assembly, a rotor assembly, and an impeller. The stator assembly and the impeller are installed in the fan cover. The impeller is opposite to the stator component in the axial direction of the fan cover. The rotor assembly penetrates through the stator assembly and is connected with the fan cover. The fan housing comprises a fan housing shell, a first bearing seat, a plurality of bosses and a plurality of connecting ribs. Each boss comprises a wind guide surface which can play a role in guiding the flow. The air guide surface of the boss can guide the flow of the air to reduce the circulation resistance of the air, so that the step flow of the air at the contact part of the air and the stator assembly can be avoided, the circulation resistance of the air is reduced, the heat dissipation efficiency of the fan is improved, and the efficiency of the fan is improved.

Description

Fan housing of fan, fan and electrical apparatus

Technical Field

The invention relates to the technical field of fans, in particular to a fan cover suitable for a fan on an electric appliance, the fan with the fan cover and the electric appliance.

Background

Along with the demand for motor lightweight is higher and higher, the heat dissipation problem of stator module is also serious gradually. In order to solve the heat dissipation problem of the motor iron core, the stator assembly is placed in front of an impeller of the fan, and the stator assembly is dissipated heat through the impeller.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, in an embodiment of an aspect of the present invention, a fan housing of a fan is provided, and in another embodiment of the present invention, a fan having the fan housing is provided, and the fan has the advantages of high heat dissipation efficiency and high fan efficiency.

According to an aspect of the invention, the fan housing of the fan comprises: the fan cover comprises a fan cover shell, a fan cover shell and a fan cover, wherein the fan cover shell is an annular piece and is provided with a cavity, and the cavity is provided with a first end and a second end which are opposite to each other in the axial direction of the fan cover; a first bearing seat located within the chamber; the bosses are positioned in the cavity and arranged on the first bearing seat at intervals along the circumferential direction of the first bearing seat, each boss comprises a wind guide surface, and the inner edge of the wind guide surface is adjacent to the first end part relative to the outer edge of the wind guide surface; and the connecting ribs are connected with the bosses in a one-to-one correspondence manner, and each connecting rib is connected with the peripheral wall surface of the cavity.

In addition, the fan cover of the fan according to the embodiment of the invention also has the following additional technical features:

in some embodiments, the chamber includes an impeller accommodating cavity and a motor accommodating cavity arranged in an axial direction of the fan housing, the first bearing seat is located in the motor accommodating cavity, and each boss is located in the motor accommodating cavity, wherein an inner edge of the air guide surface is adjacent to the impeller accommodating cavity relative to an outer edge of the air guide surface, optionally, a cross-sectional area of the impeller accommodating cavity decreases in a direction adjacent to the motor accommodating cavity, and a cross-sectional area of the motor accommodating cavity decreases in a direction adjacent to the impeller accommodating cavity.

In some embodiments, the air guiding surface of each boss is a curved surface, and optionally, each air guiding surface is an arc surface, and the air guiding surface is concave in a direction adjacent to the outer peripheral surface of the first bearing seat.

In some embodiments, an inner edge of the air guide surface of each of the bosses is connected to an outer circumferential surface of the first bearing housing.

In some embodiments, each of the bosses further includes a wind shielding surface extending outward from the first bearing seat, the wind shielding surface is opposite to the corresponding wind shielding surface in the axial direction of the wind shield, at least a part of the wind shielding surface is adjacent to the first end part relative to the wind shielding surface, optionally, the wind shielding surface of each of the bosses is flush with an end surface of the first bearing seat far away from the first end part, and optionally, an outer edge of each of the wind shielding surfaces is connected with an outer edge of the corresponding wind shielding surface.

In some embodiments, each of the connecting ribs includes: the first plane is connected with the corresponding wind shielding surface and is flush with the end surface, far away from the first end, of the first bearing seat; and the second plane is perpendicular to the first plane, the second plane is connected with the outer edge of the first plane, the second plane is located on one side, far away from the first end, of the first plane, and optionally, the size of the connecting rib in the circumferential direction of the fan housing is smaller than the size of the corresponding boss in the circumferential direction of the fan housing.

In some embodiments, the cross-section of the chamber is circular, the central axis of the first bearing seat coincides with the central axis of the chamber, and optionally, the first bearing seat, the plurality of bosses, the plurality of connecting ribs and the fan housing shell are integrally formed.

A wind turbine according to another aspect embodiment of the present invention includes: a hood according to an aspect of an embodiment of the invention; the stator assembly comprises a yoke part, a plurality of tooth parts and a plurality of stator windings, the stator windings are wound on tooth bodies of the tooth parts in a one-to-one correspondence mode, one end of the stator assembly extends into the cavity, and the tooth bodies and the stator windings are opposite to the air guide surfaces of the bosses in the axial direction of the air cover; the rotor assembly comprises a first bearing and a rotor supported on the first bearing, and the first bearing is arranged on the first bearing seat; and the impeller is arranged in the cavity, and the first bearing seat is positioned between the impeller and the stator component in the axial direction of the fan cover.

The fan provided by the embodiment of the invention comprises a fan cover provided with a boss, and the boss comprises a wind guide surface capable of playing a role in guiding wind. The wind guide surface of the boss can guide the flow of the wind to reduce the flow resistance of the wind, so that the wind can be prevented from flowing in a step mode at the contact position of the wind and the stator assembly, and the flow resistance of the wind is reduced. Therefore, the air guide surface of the boss enables the boss to eliminate step flow at the contact position of the air and the stator assembly in the prior art, flow resistance of the air in the air duct is reduced, heat dissipation efficiency is improved, and accordingly fan efficiency is improved.

Therefore, the fan provided by the embodiment of the invention has the advantages of high heat dissipation efficiency and high fan efficiency.

In addition, the fan according to the embodiment of the present invention has the following additional technical features:

in some embodiments, the fan further includes an insulating frame having a plurality of insulating portions, the insulating portions being mounted on the teeth in a one-to-one correspondence manner, each of the insulating portions includes a first protrusion and a second protrusion, the first protrusions abut against the connecting ribs in a one-to-one correspondence manner, each of the second protrusions abuts against the first bearing seat, optionally, the first protrusions abut against the first plane of each of the connecting ribs in a one-to-one correspondence manner, and optionally, the outer circumferential surface of the stator assembly abuts against the second plane of each of the connecting ribs.

In some embodiments, the projected edge of each stator winding on the respective wind-deflecting surface is adjacent to the edge of the respective wind-deflecting surface; or the edge of the projection of each stator winding on the corresponding wind shielding surface is positioned at the inner side of the edge of the corresponding wind shielding surface; or the edge of the projection of each stator winding on the corresponding wind shielding surface coincides with the edge of the corresponding wind shielding surface, and optionally, a transition air duct is defined between the wind shielding surface and the peripheral wall surface of the chamber.

In yet another aspect, embodiments of the invention provide an appliance including a blower in accordance with embodiments of another aspect of the invention.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is an exploded view of a blower according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a fan housing according to an embodiment of the invention.

FIG. 3 is a partial schematic view of a first wind turbine according to an embodiment of the invention.

Fig. 4 is a partial schematic view of a fan according to an embodiment of the present invention.

Fig. 5 is a partial schematic view three of a wind turbine according to an embodiment of the invention.

Reference numerals:

a fan 100; a stator assembly 110; a yoke portion 111; a tooth portion 112; a tooth body 113; a tooth shoe 114; a rotor assembly 120; a rotor 121; a first bearing 122; a second bearing 123; an impeller 130; an insulating frame 140; an insulating portion 141; the first protrusion 1411; the second protrusions 1412; a support frame 150; a diffuser assembly 160;

a fan housing 200; a hood housing 210; the impeller accommodating chamber 211; a motor accommodating chamber 212; a first bearing housing 220; a boss 230; a wind guide surface 231; a wind-shielding surface 232; the connecting ribs 240; a first plane 241; a second plane 242.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A wind turbine 100 according to an embodiment of the present invention is described below with reference to fig. 1-5.

As shown in fig. 1-5, the wind turbine 100 includes a wind shield 200, a stator assembly 110, a rotor assembly 120, and an impeller 130.

The stator assembly 110 and the impeller 130 are installed in the shroud 200. The impeller 130 is opposite to the stator assembly 110 in an axial direction of the shroud 200. The rotor assembly 120 is connected to the wind shield 200 through the stator assembly 110.

The wind shield 200 includes a wind shield case 210, a first bearing housing 220, a plurality of bosses 230, and a plurality of connection ribs 240.

The hood housing 210 is a ring-shaped member. The hood housing 210 has a chamber having first and second ends opposite in an axial direction of the hood 200. It is understood that the axial direction of the cowl outer 210 is the same as the axial direction of the cowl 200. The first bearing seat 220 is located in the cavity of the hood housing 210. For example, the first end of the chamber is the rear end of the chamber and the second end of the chamber is the front end of the chamber.

A plurality of bosses 230 are located in the cavity of the wind shield shell 210, and the plurality of bosses 230 are spaced apart on the first bearing seat 220 along the circumferential direction of the first bearing seat 220. Each boss 230 includes a wind guide surface 231.

The inner edge of the wind guide surface 231 is adjacent to the first end of the chamber of the fan housing 210 relative to the outer edge of the wind guide surface 231. The inner edge of the air guide surface 231 refers to an edge of the air guide surface 231 closer to the first bearing seat 220, and the outer edge of the air guide surface 231 refers to an edge of the air guide surface 231 farther from the first bearing seat 220. The inner edge of the air guide surface 231 is closer to the first end (rear end) of the chamber of the fan housing 210 than the outer edge of the air guide surface 231. In other words, the edge of the air guiding surface 231 adjacent to the first end is the inner edge thereof, and the edge of the air guiding surface 231 away from the first end is the outer edge thereof. Further, the inner edge of the air guide surface 231 is located rearward of the outer edge of the air guide surface 231.

The connection rib 240 is located between the boss 230 and the peripheral wall surface of the chamber of the hood housing 210. The plurality of ribs 240 are connected to the plurality of bosses 230 in a one-to-one correspondence, and each of the ribs 240 is connected to a peripheral wall surface of the chamber of the fan housing case 210. That is, each of the bosses 230 is connected to a corresponding rib 240, and the rib 240 is connected to a peripheral wall surface of the chamber of the hood housing 210. Therefore, the first bearing seat 220 is connected to the cowl housing 210 through the bosses 230 and the connection ribs 240.

The stator assembly 110 includes a yoke portion 111, a plurality of tooth portions 112, and a plurality of stator windings (not shown) wound around tooth bodies 113 of the plurality of tooth portions 112 in a one-to-one correspondence. One end of the stator assembly 110 extends into the cavity of the wind shield housing 210. I.e., at least a portion of the stator assembly 110 is located within the cavity of the wind shield housing 210.

The plurality of tooth bodies 113 and the plurality of stator windings face the air guide surfaces 231 of the plurality of bosses 230 in the axial direction of the shroud 200. That is, the plurality of tooth bodies 113 and the plurality of stator windings wound around the plurality of tooth bodies 113 correspond to the plurality of bosses 230 one by one. Each tooth body 113 is opposed to the wind guide surface 231 of the stator winding wound around the tooth body 113 and the boss 230 corresponding thereto in the axial direction of the wind cowl 200.

The rotor assembly 120 includes a first bearing 122 and a rotor 121 supported on the first bearing 122, the first bearing 122 being provided on a first bearing housing 220. The first bearing 122 is capable of rotating relative to the first bearing housing 220.

The impeller 130 is installed in the chamber of the hood housing 210. The first bearing housing 220 is located between the impeller 130 and the stator assembly 110 in an axial direction of the shroud 200. That is, the impeller 130 is adjacent to a first end of the chamber of the wind shield housing 210 relative to the stator assembly 110. It can also be said that the impeller 130 is located on a side of the first bearing housing 220 adjacent to the first end, and the stator assembly 110 is located on a side of the first bearing housing 220 away from the first end.

The impeller 130 blows air in the direction of the second end of the chamber of the shroud housing 210 as it rotates, which can cool the stator assembly 110. In the flowing process, the wind flows along the wind guide surface 231, and the wind guide surface 231 enables the wind to flow more smoothly, so that the resistance of the wind in the flowing process is reduced. Since the tooth body 113 and the stator winding wound around the tooth body 113 are opposed to the wind guide surface 231 in the axial direction of the wind cover 200, the wind guide surface 231 prevents the wind from directly colliding with the tooth body 113 and the stator winding wound around the tooth body 113 to cause a step flow. In other words, the tooth body 113 and the stator winding wound around the tooth body 113 do not generate resistance to the flow of the wind. Therefore, the flow pattern of the wind is not changed by the stator assembly 110 during the circulation. The stable flow state of the wind reduces the flow resistance of the wind in the air channel, and improves the heat dissipation efficiency, thereby improving the efficiency of the fan.

For convenience of description, the technical solution will be further described below by taking the first end of the chamber of the wind shield shell 210 shown in fig. 1 to 5 as a rear end and the second end of the chamber of the wind shield shell 210 as a front end as an example. The front-to-back direction is indicated by arrows in fig. 1-5. It is understood that the axial direction of the cowl 200 is the front-rear direction.

In some embodiments, as shown in fig. 1 to 5, the chamber of the cowl housing 210 includes an impeller receiving cavity 211 and a motor receiving cavity 212 which are arranged in an axial direction (front-rear direction) of the cowl 200. As an example, the impeller 130 is installed in the impeller receiving chamber 211. The stator assembly 110 is mounted in the motor receiving cavity 212. The impeller accommodating chamber 211 is located rearward of the motor accommodating chamber 212. The impeller accommodating chamber 211 communicates with the motor accommodating chamber 212.

The first bearing housing 220 is located within the motor receiving cavity 212. Each boss 230 is located in the motor accommodating chamber 212, wherein an inner edge of the wind guide surface 231 is adjacent to the impeller accommodating chamber 211 relative to an outer edge of the wind guide surface 231. Since the impeller housing chamber 211 is located behind the motor housing chamber 212, the inner edge of the air guide surface 231 is located behind the outer edge of the air guide surface 231.

Alternatively, as shown in fig. 1 to 5, the cross-sectional area of the impeller accommodation chamber 211 decreases in a direction adjacent to the motor accommodation chamber 212, and the cross-sectional area of the motor accommodation chamber 212 decreases in a direction adjacent to the impeller accommodation chamber 211. That is, the chamber of the hood housing 210 increases after decreasing in cross-sectional area in the front-to-rear direction.

Alternatively, as shown in fig. 1-5, the shape of the hood housing 210 and the shape of the chamber match each other. That is, the fan housing 210 is a ring-shaped member with a middle portion recessed inwards.

In some embodiments, as shown in fig. 1-5, each wind guide surface 231 is a curved surface. Optionally, each wind guide surface 231 is a curved surface, and the wind guide surface 231 is concave toward a direction adjacent to the outer circumferential surface of the first bearing seat 220. The design that the wind guide surface 231 is sunken towards the direction of the outer peripheral surface that is close to the first bearing seat 220 compares with the wind guide surface 231 is sunken towards the direction of the outer peripheral surface that is far away from the first bearing seat 220, and the structure is more reasonable, can guide the flow of this wind better, reduces the circulation resistance of this wind, further improves cooling efficiency to further improve fan efficiency.

In some embodiments, as shown in fig. 2-5, each boss 230 is connected to an outer peripheral surface of the first bearing housing 220. A plurality of bosses 230 are provided on the outer circumferential surface of the first bearing housing 220 at intervals in the circumferential direction of the first bearing housing 220. The inner edge of each air guide surface 231 is connected to the outer circumferential surface of the first bearing housing 220. The inner edge of the wind guide surface 231 is connected with the outer peripheral surface of the first bearing seat 220 so that the wind guide surface 231 and the outer peripheral surface of the first bearing seat 220 form a smooth transition surface in a flow channel of the wind, the circulation resistance of the wind is reduced to the maximum extent, and the formation of step flow is avoided, thereby further improving the cooling efficiency of the fan and the operating efficiency of the fan.

In some embodiments, as shown in fig. 2-5, each boss 230 further includes a wind-blocking surface 232. The wind-shielding surface 232 extends outwardly from the first bearing housing 220. For example, the wind shielding surface 232 extends from the first bearing seat 220 to a direction away from the first bearing seat 220, and for example, the wind shielding surface 232 extends from the first bearing seat 220 to a peripheral wall surface of the chamber adjacent to the wind shield case 210.

At least a portion of the wind guide surface 231 is adjacent to the first end of the chamber of the hood housing 210 opposite to the wind guide surface 232. At least a part of the wind guiding surface 231 adjacent to the first end portion with respect to the wind guiding surface 232 means: at least a part of the wind guide surface 231 is located behind the wind guide surface 232.

In some embodiments, as shown in fig. 2-5, the wind-shielding surface 232 of each boss 230 is flush with an end surface of the first bearing seat 220 that is distal from the first end of the chamber of the wind shield shell 210. An end surface of the first bearing seat 220 away from the first end of the chamber of the wind shield shell 210 is a front end surface of the first bearing seat 220. Each wind shielding surface 232 is flush with the front end surface of the first bearing housing 220.

Alternatively, the inner edge of the wind shielding surface 232 of each boss 230 is connected to the outer circumferential surface of the first bearing housing 220, and further alternatively, as shown in fig. 2 to 5, the inner edge of the wind shielding surface 232 of each boss 230 is connected to the outer edge of the front end surface of the first bearing housing 220. The wind shielding surface 232 of each boss 230 extends outwardly from the junction with the outer edge of the front end surface of the first bearing housing 220.

Alternatively, as shown in fig. 2 to 5, an outer edge of each wind guide surface 232 is connected to an outer edge of the corresponding wind guide surface 231. The wind flows forward along the wind guide surface 231 and then flows over both sides and the outer edge of the wind shielding surface 232, and the wind shielding surface 232 thereby plays a role of shielding wind. The wind shielding surface 232 is a front end surface of the boss 230.

In some embodiments, as shown in FIG. 1, wind turbine 100 further includes an insulating frame 140. The insulating frame 140 has a plurality of insulating portions 141. The plurality of insulating portions 141 are mounted on the plurality of teeth 112 in a one-to-one correspondence, and the insulating portions 141 serve as insulation.

Wherein each insulation part 141 includes a first protrusion 1411 and a second protrusion 1412. The first protrusions 1411 are abutted against the connecting ribs 240 in a one-to-one correspondence, and each second protrusion 1412 is abutted against the first bearing seat 220.

In some embodiments, as shown in fig. 2-5, each tie rib 240 includes a first planar surface 241 and a second planar surface 242.

The first plane 241 of the connecting rib 240 is connected to the corresponding wind shielding surface 232. The corresponding wind shielding surface 232 of the first plane 241 of the connecting rib 240 refers to: and a wind shielding surface 232 of the boss 230 connected to the connection rib 240. By way of example, the first plane 241 is connected to an outer edge of the corresponding wind shielding surface 232. The first plane 241 is flush with an end surface of the first bearing seat 220 away from the first end of the chamber of the hood housing 210. I.e., the first plane 241 is flush with the front end surface of the first bearing housing 220.

The second plane 242 is perpendicular to the first plane 241. The second plane 242 is connected to an outer edge of the first plane 241, and the second plane 242 is located on a side of the first plane 241 away from the first end of the chamber of the fan housing 210. I.e. the second plane 242 is located in front of the first plane 241. The second plane 242 extends forward from a junction with an outer edge of the first plane 241.

As shown in fig. 2 to 5, for example, the front end surface of the first bearing seat 220 and the wind shield 200 are perpendicular to each other in the axial direction (front-rear direction), and the wind shielding surface 232 and the first plane 241 are flush with the front end surface of the first bearing seat 220. The second plane 242 is parallel to the axial direction (front-rear direction) of the fan cover 200.

Alternatively, as shown in fig. 2-5, a plurality of first protrusions 1411 are abutted against the first plane 241 of each of the connecting ribs 240 in a one-to-one correspondence.

Further optionally, the outer circumferential surface of the stator assembly 110 abuts the second plane 242 of each tie rib 240.

As an example, as shown in fig. 5, each second protrusion 1412 abuts against a front face of the first bearing housing 220.

Alternatively, as shown in fig. 2 to 5, the plurality of second protrusions 1412 are opposite to the plurality of tooth shoes 114 one by one in the axial direction of the cowl 200. That is, each tooth shoe 114 is opposed to the front end surface of the first bearing housing 220 in the axial direction of the cowl 200. The plurality of tooth shoes 114 define a receiving cavity for receiving the rotor 121, through which the rotor 121 is coupled to the first bearing housing 220.

As shown in fig. 2 to 5, the wind flow channel in the wind shield 200 is mainly divided into two parts: the first part is a passage formed between adjacent teeth 112 inside the stator assembly 110, and the wind blows forward along the axial direction of the wind shield 200 in the passage, contacts the stator core and the stator windings, and cools them. The second portion is located outside the stator assembly 110, and is formed by the outer circumferential surface of the stator assembly 110 and the circumferential wall surface of the chamber of the fan housing 210, and is divided by the connecting ribs 140 into a plurality of channels arranged along the circumferential direction of the fan housing 200, in which the wind contacts the outer circumferential surface of the stator assembly 110 to cool the stator assembly 110. This wind can not produce the step flow because of blockking in above-mentioned two circulation passageways, and the circulation resistance of this wind is little, therefore the cooling effect is good, cooling efficiency is high to fan efficiency has been improved.

The air guide surface 231 and the peripheral wall surface of the chamber of the fan housing case 210 (the fan housing case 210) define a transition air duct therebetween. The transition air duct communicates the impeller accommodating cavity 211 with the second partial passage, and the air flows through the transition air duct from the impeller accommodating cavity 211 and circulates along the air guide surface 231, and then enters the second partial passage. The wind has small flow resistance in the transition air duct, and does not generate step flow.

Alternatively, as shown in fig. 2 to 5, the dimension of the connection rib 240 in the circumferential direction of the cowl 200 is smaller than the dimension of the corresponding boss 230 in the circumferential direction of the cowl 200. This design has reduced the resistance of splice bar 240 to this wind in the wind channel, has improved the cooling efficiency of this wind to fan efficiency has been improved.

It is understood that the circumferential direction of the wind boot 200 is the same as the circumferential direction of the first bearing housing 220.

In some embodiments, as shown in fig. 2-5, the chamber of the hood housing 210 is circular in cross-section. The central axis of the first bearing seat 220 coincides with the central axis of the chamber, so that the structure of the wind shield 200 is more reasonable.

Optionally, the first bearing seat 220, the plurality of bosses 230, the plurality of connection ribs 240, and the cowl outer 210 are integrally formed, so that the structure of the cowl 200 is more reasonable.

In some embodiments, as shown in fig. 3-5, the stator assembly 110 includes a stator core including an annular yoke portion 111 and a plurality of tooth portions 112 provided on an inner circumferential surface of the yoke portion 111. A winding slot is formed between two adjacent teeth 112. That is, a plurality of teeth 112 are provided at intervals around the inner circumferential surface of the yoke 111.

As an example, as shown in fig. 3 to 5, tooth portion 112 includes a tooth body 113 and a tooth shoe 114, where tooth body 113 is connected to an inner circumferential surface of yoke portion 111, and tooth shoe 114 is connected to an inner end of tooth body 113. That is, a tooth shoe 114 is connected to one end of the inner circumferential surface of the tooth body 113 away from the yoke portion 111. The plurality of stator windings are wound around the plurality of tooth bodies 113 in a one-to-one correspondence. That is, a plurality of stator windings are in one-to-one correspondence with a plurality of tooth bodies 113, and each tooth body 113 is wound with the corresponding stator winding.

In some embodiments, the projected edge of each of the stator windings on the respective wind-deflecting surface 232 is adjacent to the edge of the respective wind-deflecting surface 232. That is, the dimension of each of the stator windings in the direction perpendicular to the front-rear direction is close to the dimension of the wind shielding surface 232 in the direction perpendicular to the front-rear direction. When the wind flows from back to front, the wind shielding surface 232 can shield at least most of the stator windings in the flowing direction of the wind, so that the wind is prevented from contacting the stator windings to cause step flow, and due to the similar size, the wind shielding surface 232 does not influence the cooling effect of the wind on the stator windings.

Alternatively, the edge of the projection of each of the stator windings on the respective wind-deflecting surface 232 is located inward of the edge of the respective wind-deflecting surface. That is, the dimension of each of the stator windings in the direction perpendicular to the front-rear direction is smaller than the dimension of the wind shielding surface 232 in the direction perpendicular to the front-rear direction. When the wind flows from back to front, the wind shielding surface 232 can completely shield the corresponding stator winding in the flowing direction of the wind, and the wind is prevented from contacting with the stator winding to cause step flow.

Alternatively, preferably, the edge of the projection of each stator winding on the respective wind-deflecting surface coincides with the edge of the respective wind-deflecting surface. That is, the dimension of each stator winding in the direction perpendicular to the front-rear direction is the same as the dimension of the wind shielding surface 232 in the direction perpendicular to the front-rear direction, so that the wind shielding surface 232 can completely shield the corresponding stator winding without affecting the cooling effect of the wind on the stator winding.

In some embodiments, as shown in fig. 1, the rotor 121 passes through the stator core in the axial direction of the wind shield 200 and protrudes from the stator core, and one end of the rotor 121, which protrudes from the stator core, is connected to the first bearing 122. The rotor 121 can rotate relative to the stator core by the mutual engagement of the first bearing 122 and the first bearing housing 220.

In some embodiments, as shown in FIG. 1, wind turbine 100 further includes a support frame 150, and support frame 150 includes a second bearing housing (not shown). The rotor assembly 120 further includes a second bearing 123, the second bearing 123 being coupled to the rotor 121, the second bearing 123 being provided on the second bearing housing. The support frame 150 is located at a front side of the stator assembly 110.

In some embodiments, as shown in FIG. 1, the wind turbine 100 further includes a diffuser assembly 160, the diffuser assembly 160 being coupled to the impeller 130. The diffuser assembly 160 is located on the rear side of the impeller 130.

An embodiment of another aspect of the present invention further provides an electrical appliance including the blower in the above embodiment of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A fan housing of a fan, comprising:

the fan cover comprises a fan cover shell, a fan cover shell and a fan cover, wherein the fan cover shell is an annular piece and is provided with a cavity, and the cavity is provided with a first end and a second end which are opposite to each other in the axial direction of the fan cover;

a first bearing seat located within the chamber;

the bosses are positioned in the cavity and arranged on the first bearing seat at intervals along the circumferential direction of the first bearing seat, each boss comprises a wind guide surface, and the inner edge of the wind guide surface is adjacent to the first end part relative to the outer edge of the wind guide surface; and

the connecting ribs are connected with the bosses in a one-to-one correspondence mode, and each connecting rib is connected with the peripheral wall surface of the cavity.

2. The fan housing of claim 1, wherein the chamber comprises an impeller receiving cavity and a motor receiving cavity arranged in an axial direction of the fan housing, the first bearing seat is located in the motor receiving cavity, and each boss is located in the motor receiving cavity, wherein an inner edge of the air guide surface is adjacent to the impeller receiving cavity relative to an outer edge of the air guide surface.

3. The fan housing of claim 2, wherein the impeller receiving cavity decreases in cross-sectional area in a direction adjacent to the motor receiving cavity, and the motor receiving cavity decreases in cross-sectional area in a direction adjacent to the impeller receiving cavity.

4. The fan housing of claim 1, wherein the air guiding surface of each boss is a curved surface, optionally a curved surface, and the air guiding surface is concave in a direction adjacent to the outer circumferential surface of the first bearing seat.

5. The fan housing of claim 4, wherein an inner edge of the air guide surface of each of the bosses is connected to an outer circumferential surface of the first bearing housing.

6. The fan housing of claim 1, wherein each of the bosses further comprises a wind-deflecting surface extending outwardly from the first bearing seat, the wind-deflecting surface being axially opposite the respective wind-deflecting surface, at least a portion of the wind-deflecting surface being adjacent the first end relative to the wind-deflecting surface.

7. The fan housing of claim 6, wherein the wind shielding surface of each of the bosses is flush with an end surface of the first bearing seat away from the first end, and an outer edge of each of the wind shielding surfaces is connected to an outer edge of the corresponding wind shielding surface.

8. The fan housing of claim 6, wherein each of the ribs comprises:

the first plane is connected with the corresponding wind shielding surface and is flush with the end surface, far away from the first end, of the first bearing seat; and

the second plane is perpendicular to the first plane, the second plane is connected with the outer edge of the first plane, and the second plane is located on one side, far away from the first end, of the first plane.

9. The fan housing of claim 8, wherein a dimension of the connection rib in a circumferential direction of the fan housing is smaller than a dimension of the corresponding boss in the circumferential direction of the fan housing.

10. The fan housing of claim 1, wherein the chamber is circular in cross-section, and a central axis of the first bearing seat coincides with a central axis of the chamber.

11. A fan, comprising:

a fan housing of a fan according to any of claims 1-10;

the stator assembly comprises a yoke part, a plurality of tooth parts and a plurality of stator windings, the stator windings are wound on tooth bodies of the tooth parts in a one-to-one correspondence mode, one end of the stator assembly extends into the cavity, and the tooth bodies and the stator windings are opposite to the air guide surfaces of the bosses in the axial direction of the air cover;

the rotor assembly comprises a first bearing and a rotor supported on the first bearing, and the first bearing is arranged on the first bearing seat; and

the impeller is installed in the cavity, and the first bearing seat is located between the impeller and the stator assembly in the axial direction of the fan cover.

12. The fan according to claim 11, further comprising an insulating frame having a plurality of insulating portions, the plurality of insulating portions being mounted on the plurality of teeth in a one-to-one correspondence, wherein each of the insulating portions includes a first protrusion and a second protrusion, the plurality of first protrusions abutting against the first plane of the plurality of connecting ribs in a one-to-one correspondence, each of the second protrusions abutting against the first bearing seat, and an outer circumferential surface of the stator assembly abutting against the second plane of each of the connecting ribs.

13. The fan as recited in claim 11,

the edge of the projection of each stator winding on the corresponding wind shielding surface is adjacent to the edge of the corresponding wind shielding surface;

or the edge of the projection of each stator winding on the corresponding wind shielding surface is positioned at the inner side of the edge of the corresponding wind shielding surface;

or the edge of the projection of each stator winding on the corresponding wind shielding surface is coincident with the edge of the corresponding wind shielding surface.

14. The fan as claimed in claim 13, wherein the air guide surface and a peripheral wall surface of the chamber define a transition duct therebetween.

15. An electrical appliance, comprising: the blower of claims 11-13.